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Kim Kardashian and Khloé Kardashian showed off their bootylicious figures in similar form-fitting dresses yesterday while filming 'Keeping Up With the Kardashians' and one thing's for sure -- their butts are out of this world.

No, seriously, we don't think you're ready for this jelly. You need to see these things up close and personal. We're kind of struggling to figure out which sister has the better booty. Please help us?